SonHisako made "Black." available on November 14, 2020. The duration of Black. is about two minutes long, specifically at 2:03. This song does not appear to have any foul language. Black.'s duration is considered a little bit shorter than the average duration of a typical track. Because this song is the only song in Black. and no other songs are present in the album, we classify this track as a single. Black. is below average in popularity right now. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

Black. テンポ

The tempo marking of Black. by SonHisako is Andante (at a walking pace), since this song has a tempo of 77 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

Black. キー

This song has a musical key of A♭ Major. This also means that this song has a camelot key of 4B. So, the perfect camelot match for 4B would be either 4B or 5A. While, 5B can give you a low energy boost. For moderate energy boost, you would use 1B and a high energy boost can either be 6B or 11B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 4A or 3B will give you a low energy drop, 7B would be a moderate one, and 2B or 9B would be a high energy drop. Lastly, 1A allows you to change the mood.